1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ESDS_H_ 18 19 #define ESDS_H_ 20 21 #include <stdint.h> 22 23 #include <media/stagefright/MediaErrors.h> 24 25 namespace android { 26 27 class ESDS { 28 public: 29 ESDS(const void *data, size_t size); 30 ~ESDS(); 31 32 status_t InitCheck() const; 33 34 status_t getObjectTypeIndication(uint8_t *objectTypeIndication) const; 35 status_t getCodecSpecificInfo(const void **data, size_t *size) const; 36 status_t getCodecSpecificOffset(size_t *offset, size_t *size) const; 37 status_t getBitRate(uint32_t *brateMax, uint32_t *brateAvg) const; 38 status_t getStreamType(uint8_t *streamType) const; 39 40 private: 41 enum { 42 kTag_ESDescriptor = 0x03, 43 kTag_DecoderConfigDescriptor = 0x04, 44 kTag_DecoderSpecificInfo = 0x05 45 }; 46 47 uint8_t *mData; 48 size_t mSize; 49 50 status_t mInitCheck; 51 52 size_t mDecoderSpecificOffset; 53 size_t mDecoderSpecificLength; 54 uint8_t mObjectTypeIndication; 55 uint8_t mStreamType; 56 uint32_t mBitRateMax; 57 uint32_t mBitRateAvg; 58 59 status_t skipDescriptorHeader( 60 size_t offset, size_t size, 61 uint8_t *tag, size_t *data_offset, size_t *data_size) const; 62 63 status_t parse(); 64 status_t parseESDescriptor(size_t offset, size_t size); 65 status_t parseDecoderConfigDescriptor(size_t offset, size_t size); 66 67 ESDS(const ESDS &); 68 ESDS &operator=(const ESDS &); 69 }; 70 71 } // namespace android 72 #endif // ESDS_H_ 73